Blank-furnace.



No. 712,296. Patented'ct. 423, |902.

M. GORHAM.

BLANK FURNACE.

(Application mea Apr. 14, 1902.)

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UNITED STATES PATENT OEEICE.

i MARVINE GOEHA'M, or DETROIT, MICHIGAN.

BLANK-FURNACE.

SPECIFICATION forming part of Letters Patent No. 712,296, dated October 28, 1902.

Application filed April 14, 1902. Serial No. 102,874. (No model.) I

and particularly to aportable forge-furnace for heating metal blanks; and it consists in the novel construction of the furnace and in the peculiar arrangement and combination of its various parts, as will be more fully hereinafter described and illustrated.

Figure l is a View in elevation of a furnace embodying my invention. Fig. 2 is a vertical central section therethrough. Fig. 3-

is a section taken on line wm, Fig. 2; and Fig. 4. is a top plan view of the furnace-head.

In the drawings thus briefly referred to the reference-letter A designates a supportingframework carrying at its top a circular track B and provided centrally with a blast-nozzle C.

D is a fuel-burner of any approved type arranged beneath the nozzle.

D represents a rotary table supported upon balls E, which are adapted to travel in an annular groove a in the track.

F is the furnace-head, the peculiar construction of which will be hereinafter described, detachably arranged upon the table and provided with handles G, by means of which it may be rotated. In constructionthe head comprises a framework lined with rebrick, the frame consisting of uprights H, cross-bars I, and a bottom plate J, bolted to the uprights and forming a support for the lining. Upon the plate J is arranged the bottom section K of the lining, and, as shown, this section is centrally apertured, as at L,

and of a conical shape, the surface being in- Y M, preferably four in number, are formed in the walls of the furnace.

By constructing the head in the manner set forth the slag formed by imperfectly-vaporized oil striking against the furnace sides will be conveyed to and collected within the radial dischargeopenings, and thus prevented fromjclogging the burner. The'openings referred to are provided with closures O,which may be withdrawn when desired toallow of the removal of the slag.

yThe lining or furnace wall extends upwardly within the frame described to near the top P, andthe latter is 'supported upon the corner portionsP only of the fire-brick, which project upwardly from the wall proper a short distance. As thus constructed elongated transverse openings P2 are formed, one in each side of the furnace-head, and each of these openings is filled with a series of apertu red sections Q, of either tire-brick or metal, which receive the blanks.

The top or cap P referred to is composed of fire-brick arranged within a rectangular Inetallic frame R, Fig. 1l, and clamped within said frame by means of a clamping-plate S and set-screws T, extending through one side ofthe frame, as indicated. The frame in turn is secured to the uprights l-I by suitable bolts c. By supporting the top upon the corners of the furnace-wall itv will be obvious that the apertured sections through which the blanks extend are free from i-ts'weight and may consequently be withdrawn from the lining, of which they forma part, when desired for the purpose'of repair or replacement as may be necessary.

Within the interior of the furnace-head is a transverse partition U, extending, preferably, across from one side to the opposite side of the head and spaced from the other two sides, as shown in Fig. 2. This partition divides the interior ofgthe furnacerinto a lower combustion-chamber V and an upper heatingchamber W', the wall surrounding the latter being composed chieiiy of the removable sections before described.

X designates a vent-opening which is arl into the combustion-chamber, and the heat is deflected by the partition U to the sides of the furnace, where it comes in contact with the metal blanks inserted in the usual manner within the apertured segments. The products of combustion find an exit through the centrally-located vent-opening X.

By the use of the partition described the blast is prevented from directly coming in contact with the blanks and the heat distributed so that it is uniform in the heatingchamber. Also by deflecting the blast in the manner set forth the formation of scale upon the blanks is prevented.

It is to be noticed from the construction of the heating-chamber, which is entirely open and unobstructed from side to side, that, if desired, long bars may be inserted within the furnace and the middle portions thereof heated, if desired. The bars areinserted through the series of openings at one side of the head and are projected through the apertured segments in the opposite side, the blank-openings in the two sides registering. Attention is further drawn to the fact that the furnacehead construction is of such a character as will allow the head to be easily removed from the table upon which it is supported and replaced by' others either larger or smaller, according to the character of the work that is to be performed. The removal of the head is effected through the agency of the liftingeyes described and suitable appliances which may be connected to the eyes.

What I claim as my invention isl. In aforge-furnace, the combination with a support,of a table rotatively mounted thereon, the furnace proper arranged Wholly above the table and detachably mounted thereon, and a fuel-burner below the furnace in operative relation thereto.

2. Ina forge-furnace, the combination with the furnace-head having an apertured and inclined bottom section and one or more radial discharge-openings in proximity to said section, of a support upon which the furnacehead is mounted, and a fuel-burner below and in operative relation to the head.

3. In aforge-furnaee, the combination with a furnace-head having formed therein a combustion and a heating chamber, of a support upon which the head is mounted, a hydrocarbon-burner below said head, and one or more apertured sections forming a part of and independently removable from the wall about the heating-chamber.

4. In a forge-furnace, the combination with a support, of a furnace-head thereon comprising a vertical inclosing wall and a cap or cover supported thereon, and one or more apertured sections forming a part of the upper portion of said wall and removable therefrom independently of the cover.

5. In aforge-furnace, the combination with a furnace-head having formed in its interior a heating-chamber and a combustion-chamber occupying respectively the entire upper and lower portions of the head, a hydrocarbonburner below the furnace communicating with the combustion-chamber,and aplurality of apertured sections forming a portionof and removable independently from the furnace-wall about the heating-chamber.

6. A forge-furnace, having a portion of its wall removable laterally independent of the wall proper and apertured to receive the blank or blanks to be heated, and a fuelburner therefor.

7. In aforge-furnace, the combination with a support, of a rolling bearing thereon, a table mounted upon said bearing, the furnace proper arranged entirely above and detachably mounted upon said table, and a hydrocarbon-burner located below the table and furnace in operative relation to the latter.

8. In a forge-furnace, the combination with a furnace-head having a plurality of radial discharge-openings in proximity to and leading from the bottom thereof, of closures for said openings, a support upon which the head is revolubly mounted, and a fuel-burner in operative relation to said head.

9. In aforge-furnace, the combination with the furnace-head provided with a heatingchamber, of a fuel-burner therefor, and one or more apertures sections forming a part of and laterally removable from the wall about the heating-chamber.

In testimony whereof I affix my signature in presence of two witnesses.

MARVINE GORI-IAM. Witnesses:

l-I. C. SMITH, M. B. ODoeHnRTY. 

